{
  "manageEntity": {
    "action": "Save",
    "entityId": "224886409",
    "entityType": "Track",
    "nonce": "0x40990d93ccb2898286964358e7495c860e64ccd4cb7a9db61ffaa154d44cb610",
    "signature": "0x6f4fd295a8acb4d05dfcc82dea8cc892325b0dc4b83ff49f2afc593cea9801ce65ac1a93dbd75fbfc9a315a3c518a93f2efed7f5a93a02f84cad1b4e87ec6d031b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}